EFI Magnum 360 vs 5.7 hemi. Opinions on cost worth ?
#1562735
01/13/14 03:21 PM
01/13/14 03:21 PM
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Joined: May 2013
Posts: 10 California
BD79RC
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OK, a little background. I'm a former 15 year Mopar parts guy (98-12). Been around cars my whole life, dad and stepdad were techs. I really like the new hemi. Drove them a bunch at the dealer, my father in law has an 05 1500 2wd that we have put 110,000 on. Nothing but fluids and plugs for maintenance. It gets 18 mpg on his trips to Chicago and Denver from San Diego. I figure I can get 15 in my 79 Ramcharger. I'm getting 10-12 from a carbed 360 magnum with a Hughes HER0814 cam, Eddy 650avs on a M1dp. 4.56 gears, 33s and a nv4500 5spd. It's got part-time axles out of an 83. After getting 11mpg overall on a 1600 mile trip to Moab and back, NY wife is asking me to look at the costs of adding efi to the magnum vs a hemi swap. Yeah, I know such a hard choice to be forced on me. So, it has to be CA legal which means all emissions junk. I can add obd1 now for minimal cost, already have most of it. How much better is obd2? More tunable right? That would cost me about $1500 to do right. Realistic mileage with efi on my 360 is 13-14 at best. My 95 1500 4x4 auto, 33s and 3.55s got 14. Heavier but better areo. The real unknown is how good can I do with the hemi? I do a lot if 300+mile trips for camping and wheeling. So it matters. Opinions?
The world is not what it used to be. Family, friends and our rights and values are all that matter. The rest I leave in God's hands.
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Re: EFI Magnum 360 vs 5.7 hemi. Opinions on cost worth ?
[Re: Mopar2DBone]
#1562738
01/14/14 12:32 AM
01/14/14 12:32 AM
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Joined: May 2013
Posts: 10 California
BD79RC
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Concidered that. 4.10s may be better. But I'm going to 35s on the next set of tires and figured I leave the 4.56s for now. With 33s I turn 2200 at 65 MPH. 4.10s would drop it to just under 2000. Part of my problem is the truck easily goes faster. 80 MPH speed limits in UT. Even though it's easily do 80, anything over 70 really starts dropping the mileage on this thing. Aerodynamic it isn't. But it is lighter than the newer trucks. Fully loaded with all our gear, full tank and my wife and I it weighs 5600#.
The world is not what it used to be. Family, friends and our rights and values are all that matter. The rest I leave in God's hands.
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Re: EFI Magnum 360 vs 5.7 hemi. Opinions on cost worth ?
[Re: BD79RC]
#1562739
01/14/14 01:32 AM
01/14/14 01:32 AM
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Joined: Jan 2010
Posts: 313 East Texas
Mopar2DBone
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Yeah 80 MPH with 4.56 gears I think you did really good to avg 10 mpg.... FWIW I have never seen a 360 get any kind of mpg at all. Everyone I have had was a total gas hog... Can't say for certain but I would think the HEMI would probably get better than the 360 but for that kind of money you could probably swap in a Cummins 4Cyl or 6cyl and problem would be solved...
Last edited by Mopar2DBone; 01/14/14 01:36 AM.
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Re: EFI Magnum 360 vs 5.7 hemi. Opinions on cost worth ?
[Re: Mopar2DBone]
#1562742
01/14/14 05:18 AM
01/14/14 05:18 AM
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Joined: Dec 2010
Posts: 12,375 SoCal
MuuMuu101
I got lucky at Woodward!
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I got lucky at Woodward!
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Posts: 12,375
SoCal
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Quote:
Would it be legal to swap in a Cummins 4bt???
You can swap in whatever you want so long as the engine is the same year or newer than the car and it meets the specific engine standards determined by the referee. I don't recall if it has to meet the engine or the car's emission standards.
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Re: EFI Magnum 360 vs 5.7 hemi. Opinions on cost worth ?
[Re: WO23Coronet]
#1562744
01/20/14 06:27 PM
01/20/14 06:27 PM
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Joined: May 2013
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BD79RC
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I understand the emissions issues. As to the 4bt, from what I've read it can't go in a light duty truck. They were only available in medium duty delivery trucks and construction equipment. But, I have seen a YJ Wrangler running around with one. Saw it at a local car show but never got to talk to the owner. Some guys swear there is a way around the regs but I haven't found one yet.
As to hemi vs 360, the hemi will get better MPG everyday. A stock 360 at least. I have a Hughes HER0814 cam. Adding headers and 1993 mpfi to start. Later I will go to obd2 from a 96-00 and add a Hughes Eddy Airgap efi and sct tune. Or the hemi. The cost of all the parts to upgrade the 360 will nearly be as much as a good used hemi. That's the big question that I don't know the answer to. The magnum maxed out or a hemi, which would be the better one for what I'm using my truck for.
The world is not what it used to be. Family, friends and our rights and values are all that matter. The rest I leave in God's hands.
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Re: EFI Magnum 360 vs 5.7 hemi. Opinions on cost worth ?
[Re: Andrewh]
#1562746
01/21/14 12:37 AM
01/21/14 12:37 AM
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Joined: Jan 2003
Posts: 5,789 Hamilton, Ontario Canada
Magnum
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Another advantage to the Hemi is about 100 horsepower over the Magnum.
How about a Hemi with an aftermarket fuel injection like FAST or Holley.
69 Super Bee, 93 Mustang LX, 04 Allure Super
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Re: EFI Magnum 360 vs 5.7 hemi. Opinions on cost worth ?
[Re: moretoys]
#1562749
01/22/14 04:34 PM
01/22/14 04:34 PM
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Joined: Aug 2004
Posts: 3,310 Walnut Creek, CA
blown340
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The 5.7L is going to make way more power and get better mileage than a smog legal 360 will hands down. Really improving the efficiency of the 360 while remaining smog compliant is going to take alot of work and you will still be compromised by the emissions rules. The hemi will probably have a higher upfront cost but don't be scared off of the project by the emissions certification, its not that hard to do.
-Jon
70 challenger convertible. 340/5 speed. blown, intercooled, efi, blah blah blah
71 valiant scamp 318/A833OD/AC/PS
00 dakota RC 4.7L 5 spd autoX'r. SRT10/T56 swap in process
73 W200 Power wagon, PTO winch, 4 spd
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Re: EFI Magnum 360 vs 5.7 hemi. Opinions on cost worth ?
[Re: blown340]
#1562750
01/23/14 07:13 PM
01/23/14 07:13 PM
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Joined: Feb 2003
Posts: 18,582 Rust Belt, SW PA
Silver70
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I Live Here
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I'm doing 6.1 swap now, same cost for swap other than the extra cost of a 6.1... let me say first hand, it's not cheap! There's probably as much money in swap parts as the 6.1 costs.
If I were doing a 5.7 swap into a truck, I'd use the dash and as much as I could from a donor vehicle. The computer/wiring is a big cost part of the swap.
68 Road Runner, 69 Belvedere, 71 Challenger Vert 340 barracuda, 01 Ram CTD, 95 Ram, 04 Ram, 85 Daytona turbo Z 66 GTO, 06 Magnum RT AWD. 07 Ram CTD, 07 Ram
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Re: EFI Magnum 360 vs 5.7 hemi. Opinions on cost worth ?
[Re: blown340]
#1562751
01/27/14 11:58 PM
01/27/14 11:58 PM
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Joined: May 2013
Posts: 10 California
BD79RC
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that's the rub, smog legal. I have all the stuff to go obd1. but i lived in NV in a non smog county when i built this magnum. the cam isn't that big but is on a 112 LSA. i'm waiting to hear back from Dave at Hughes for his opinion on my cam and obd1. damn thing runs great, just want more mileage and to be smog legal. it's a pain going up to NV just for vehicle registration. most everyone i knew has moved away too.
i wouldn't even be thinking about the hemi if i could swap a 4bt in. two guys i know that did it (not CA)love it, 20+mpg. the nearest smog ref is 40 mi away, just gotta go down and talk to him. too many ideas, not enough info to make a decision. thanks everyone, i'll let you know what the ref says.
The world is not what it used to be. Family, friends and our rights and values are all that matter. The rest I leave in God's hands.
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